EP 0633229 B1 19980520 - Process for producing a cylindrical product in the form of a tube and/or rod of multi-component glass
Title (en)
Process for producing a cylindrical product in the form of a tube and/or rod of multi-component glass
Title (de)
Verfahren zum Herstellen eines zylindrischen Körpers aus Multikomponentenglas in Form eines Rohres und/oder eines Stabes
Title (fr)
Procédé de fabrication d'une pièce cylindrique sous forme de tube et/ou de barreau constituée d'un verre multicomposants
Publication
Application
Priority
FR 9308283 A 19930706
Abstract (en)
[origin: EP0633229A2] Process for the manufacture of a cylindrical article made of multicomponent glass, comprising the following operations: - a vertical cylindrical cavity (1) lined with porous membranes (2, 3) is used, whose internal dimensions are very slightly greater than those of the article and in which a cylindrical pedestal (5) can slide, - a stub (11) consisting of glass is provided on the pedestal, - the stub is heated to melting and a gas is injected continuously into the porous membranes in order to maintain a thin layer of gas between them and the molten stub, thus preventing any contact, - the stub is fed in the molten state via the top of the cavity (30) by a continuous dispensing of a powder of the constituents of the glass whose composition is varied in step with the formation of the article, the glass of which the article consists thus having a composition which is variable lengthwise, - the pedestal is moved down in step with the formation of the cylindrical article. <IMAGE>
IPC 1-7
C03B 37/012; C03B 19/01; C03B 17/04; G01D 5/26; G02B 6/16; G02B 6/22; H01S 3/03
IPC 8 full level
C03B 19/01 (2006.01); C03B 37/012 (2006.01); C03B 40/04 (2006.01)
CPC (source: EP US)
C03B 19/01 (2013.01 - EP US); C03B 37/01211 (2013.01 - EP US); C03B 37/01294 (2013.01 - EP US); C03B 40/04 (2013.01 - EP US); G02B 6/02052 (2013.01 - EP US); C03B 2201/82 (2013.01 - EP US); C03B 2203/18 (2013.01 - EP US)
Designated contracting state (EPC)
DE DK FR GB IT NL SE
DOCDB simple family (publication)
EP 0633229 A2 19950111; EP 0633229 A3 19951102; EP 0633229 B1 19980520; CA 2127345 A1 19950107; DE 69410352 D1 19980625; DE 69410352 T2 19981029; FR 2707285 A1 19950113; FR 2707285 B1 19950811; US 5618325 A 19970408
DOCDB simple family (application)
EP 94401486 A 19940630; CA 2127345 A 19940704; DE 69410352 T 19940630; FR 9308283 A 19930706; US 26658494 A 19940628